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Finding the Fourth Proportional to 660,545.17, 991,199.12 and 356,940.37

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Solution

The fourth proportional to 660,545.17, 991,199.12 and 356,940.37 is: 535,616.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,545.17 : 991,199.12 = 356,940.37 : x
  2. Step 2: Convert to fraction form
    660,545.17/991,199.12 = 356,940.37/x
  3. Step 3: Cross multiply
    660,545.17x = 991,199.12 × 356,940.37
  4. Step 4: Simplify right side
    660,545.17x = 353,798,974,788.13
  5. Step 5: Solve for x
    x = 353,798,974,788.13/660,545.17
  6. Step 6: Final answer
    x = 535,616.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.